Patent GB-190522590-A (GB)
Title: Improvements in or relating to Charging & Developing Attachments for Photographic Cameras
Inventor: WLADIMIROFF NICOLAS
Filed: 1905-11-04
Granted: 1906-11-03
Abstract: 22,590. Wladimiroff, N. Nov. 5, 1904, [date applied for under Patents Act, 1901]. Dark slides; roller slides; apparalus for developing; lifters and holders. - An attachment is described for cameras to enable the charging, exposure, and development to be done in daylight ; it can be used either for plates or roll-films of different sizes and is fitted with light-tight attachments with arm-holes for manipulating, with viewing eyepieces, and with frames for depressing the roll film into the developing-dish, or, when plates are used, for raising and lowering the plates to and from the dish. The attachment A, Figs. 1, 3, and 5, is closed at the top by folding covers, the film being passed round guide-rollers 7, 8. The spool pivots 53 are carried on adjustable arms 11 for various sizes of spool. The spools are geared together by gear-wheels which can be disconnected at will. In charging the attachment with plates, the covers 3, 4, 5, 6 are opened up, and a framework c attached, the latter having viewing eyepieces 49, and arm-holes 50. A plate is taken out from its packet within the enclosure, and dropped through the attachment A into the dish B, and the sliding shutter 1 closed, thus isolating the plate. The dish B is light-tight, and is attached by means of the intermediate frame 47, which can be fitted with the plate lifter or holder 43, shown separately in Fig. 8. This has sliding rods 45 for manipulating plates of different sizes, and is raised and lowered by a sliding rod engaging the wedge-shaped end of the handle. The casing C is then removed, the plates 3, 4, 5, 6 closed up, the shutter 1 withdrawn, and the plate raised as shown in Fig. 5. The shutter is then closed, and in sliding raises the plate into the attachment. Here it is clamped in a groove in the wall by a sliding plate 17 recessed within the wall. A second plate 16 prevents the plate from inadvertently falling backward. The attachment A is removed from the frame 47 and attached to the camera for exposure. For developing plates and flat films, the developing-dish is attached and the plate dropped in, after which the attachment C is added. The cover 5 is fitted with a non-actinic window to admit light, and the dish may have a transparent bottom and be fitted with folding legs 46. In developing roll-films, the end of the black cover paper is withdrawn through the side slot 13, and a short piece of paper is attached to the end of the film and passed beneath the rollers of a frame which has been attached, so that, as the black paper is withdrawn, the film is wound on the empty roller, owing to the connecting-gearing between the rollers. Thus the film can be wound to and fro between the rollers, and the developing-bath changed according to requirements by raising the frame and closing the sliding shutter 1. In a modified construction of apparatus, the walls 3, 4, 5, 6 are detachable, and a closed camera-like attachment with viewing eyepieces in place of the lens, but without arm-holes, can be attached.